Light metals-foreword
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11/7/03
10:19 AM
Page 2703
Light Metals–Foreword During its brief history, the Journal of Light Metals developed the concept of having a special issue of the Journal dedicated to a given topic and having a member of the Editorial Board act as a focal point for inviting authors, etc. Although the papers were invited, they were reviewed by the responsible board member acting as key reader, and one additional reviewer. The papers in this section will be the first for Metallurgical and Materials Transactions for the Light Metals Section, but it is hoped that this concept will be followed in the future. During the past few decades there has been a significant increase in our understanding of the relationships among composition, processing, microstructure and properties of aluminum alloys. The knowledge base has come from the scientific literature, which gives guidelines for these relationships, and industrial experiments, which give detailed information on how processing affects microstructure and properties. Combining the information obtained from both sources has aided in replacing the 'trial and error' approach to alloy development. Authors who have made significant contributions to our understanding of aluminum metallurgy were invited to present some of their latest work for this special section. In order to optimize the precipitation, and thus the strength, in a number of age hardening systems, metallurgists often use either cold work prior to aging or the addition of trace alloy additions. The leadoff paper by Sato and coworkers describes a methodology for selecting trace alloy additions to aid in the nucleation of strengthening precipitates. A paper by Shiflet and coworkers follows, and describes how cold work prior to aging can affect the competitive precipitation of different strengthening precipitates in a complex alloy system. The series of four papers by Nes and coworkers are related to the development of hot deformation structures and how different modes of deformation and the distribution of nucleation sites affect the recrystallization process. We believe that the continued development of our scientific knowledge of chemistry/processing/structure of alloys will aid in the intelligent design of both alloys and improved processing methods and look forward to Metallurgical and Materials Transactions being a forum for Light Metals in this area. Edgar A. Starke, Jr. Department of Materials Science and Engineering University of Virginia
METALLURGICAL AND MATERIALS TRANSACTIONS A
VOLUME 34A, DECEMBER 2003—2703
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